Refurbished K’NEX K-Force K-20X Building Set for Ages 8+, Engineering Education Toy, 165 Pieces

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Refurbished K’NEX K-Force K-20X Building Set for Ages 8+, Engineering Education Toy, 165 Pieces

Product Description

Build, customise and blast. K-FORCE K-20X Building Set from K’NEX lets your children design and create the blaster of their dreams. With 165 K’NEX pieces, kids will enjoy building four different colourful dart blasters.

This set contains K’NEX rods and connectors, plus special parts for creating different exciting blasters. It has a blaster chamber that fires a dart up to 75 feet and two skull dart holders to keep darts attached to the blaster as kids head into battle. It also has a quick-fit grip that fits comfortably in a kid’s hand to make shooting easier. The K-FORCE K-20X Building Set also contains a preload ring and five foam darts. Kids will enjoy exciting shooting fun that is totally safe, while stimulating their imaginations and improving hand-eye coordination

K’NEX K-FORCE K-20X Building Set has easy-to-follow step-by-step building instructions for the three alternate blaster and target figures, which will guide your children in constructing their dart blasters.

The K-20X Building Set is compatible with the entire K-FORCE Build and Blast line. Kids can ask their friends to play along with them with this K-20X Building Set and they can combine their K’NEX sets to build even bigger blasters and more intricate targets.

Help your kids increase their knowledge of STEAM (science, technology, engineering, arts and math) concepts by firing up their natural curiosity and creativity. Building with K’NEX puts children on the path to a fundamental understanding of STEAM subjects. Let them design, construct and customise their own K-FORCE blasters as they enjoy non-stop interactive excitement.

Please note item has been checked by our team. In original box but box may be damaged. Inside packaging has been opened. May not be suitable as gift.


All of our items can be picked up from our warehouse, please contact us first for discounted price due to postage saving. 

If our listing states ‘COLLECTION ONLY’ then the item is collection only. We will not post the item and will expect the buyer to contact us to arrange collections. If we do not hear from you, we will contact to cancel the collection.

We use three courier services, Royal Mail, UK Mail and MyHermes. Please note items under £30 will not be sent tracked if sent using Royal Mail. We have weight and size restrictions with Royal Mail so we may not be able to fulfil requests with which courier service to use. UK Mail and MyHermes are both tracked services.

Please read below terms carefully:

  • We do not do guarantee delivery, all delivery dates shown on eBay are estimated by eBay's system automatically.
  • We will mark the item as dispatch after we purchased the shipping from courier, in odd occasion the courier company may not come to collect our parcels due to bad traffic, Please do not rely on the "dispatch" email sent by eBay's system
  • We may have to test the item the same day we dispatched it, hence your parcel might be delayed if we run out of time, however, this situation is very rare
  • Please contact us if your item was not delivered on time, and we will refund your delivery cost if you have chosen next day delivery
  • We may upgrade your delivery service from 3-5 working days to next working day for free due to work force assignment, your parcel might be delivered earlier than estimated dates.
  • We have pre-notification service with our courier, you will be sent text message or email by courier company before they attempt to deliver. Please check your email and mobile every day after your item was marked as dispatched. 
  • Some courier services will email you saying the item has been dispatched and on it’s way, please note the email is an automatic email sent to customers from the courier company, not from us. We cannot stop the notifications about orders being dispatched and on its way.
  • We will do our best to help on any delivery issue, please do understand the delivery is done by third party and we are not responsible if the item was lost or damaged during delivery, because it is out of our control.

Please contact us for postal quotation for below post code area, a courier surcharge will be applied. Also express delivery option will not be applicable to these area.

  • Northern Ireland: post code: BT
  • Channel Islands: post code: GY
  • Isle of Man: post code: IM
  • Jersey: post code: JE
  • Scottish Highlands: post code: AB31-38, AB40-56, IV1-28, IV30-32, IV36-40, IV52-54, IV63, KW1-14, PA21-38, PA4, PA41, PA49-50, PH18-26, PH30-41, PH49-50, PH15-18
  • Scottish Islands: post code: HS, IV41-49, IV51, IV55-56, KA27-28, KW15-17, PA20, PA41-49,PA60-78,PH42-44,ZE


There may be some locations that we cannot ship to, most small items can be sent using Royal Mail but due to our weight and size restrictions, some heavier/bigger items may not be sent to the post codes above. We will try our best to dispatch any items to the post codes above but please bear in mind we may have to cancel the order if the item is too heavy/big and is going to a remote area.

All order made after 2:00pm will be dispatched next day.

Please be aware courier does not work at weekends and national holidays so do be aware of deliveries being delayed. 

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