Brain Crunch Smart Machines Remote Robots Building Kit

You bet there is! Please subscribe for early access to sales at the bottom of this page. Plus, we will send you a $10 off discount code.

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The fine print: you can use it on any purchase over $50 within 7 days of receiving the code.

Please note, we do not offer a military discount at this time.

Unfortunately, most manufacturer warranties do not apply to items purchased secondhand on our site. We do offer a 1 year protection plan if you would like to add that to your purchase. If you prefer a manufacturer warranty with your product, we suggest purchasing brand new from the manufacturer.

GoodBuy Gear's Protection Plan warrants select products to be free from any manufacturing defects for a period of one year from the date of purchase under normal use and in compliance with the operating instructions. More details.

With the largest baby & kid gear database in the industry, we have created an extensive, proprietary quality check process that each item must pass to be listed for resale.

Condition descriptions:

• Unopened & Overstock – Item is in original packaging and/or has the tags still attached. Box may have damage, but the product has no signs of use and is in new condition.
• Open Box - Box has been opened and item may or may not have been removed. These products are typically floor models or returns that have been inspected for safety, functionality and cleanliness. Flaws, if any, will be minor. The original box may not be included.
• Barely Used – Item will show minimal signs of use and may not have the original packaging or tags. 
• Gently Used – Item may show some signs of use, like minor scratches or stains, but will still be in perfect working order (e.g. battery operated functions all work properly), unless otherwise noted in the comments and/or pictures.
• Loved – Item shows signs of wear in the form of tears, fabric stains or fading, and may be missing pieces.  Some features or functions may not be working properly, but if the item is not working properly it will be noted.

We partner with these brands and more:

• 4moms
• Baby Brezza
• Baby Jogger
• babyark
• Babymoov
• Bombi
• Bugaboo
• Bumbleride
• Ceres Chill
• Clek
• Colugo
• Crane Baby
• Cybex
• Ellavate Wagons
• Gladly
• Graco
• HALO
• Harbor
• Hatch
• Janod
• Joolz
• Joovy
• Jura
• Larktale
• Little Partners
• Mabe
• Mima
• Mockingbird
• Nanit
• Nurture&
• Piccalio
• Plan Toys
• RadioFlyer
• Silver Cross
• Slumberpod
• SmarTrike
• Snuz
• Stokke
• Thule
• Toddlekind
• Toki Kids
• Ubbi
• UPPAbaby
• WayB
• Wonderfold
• Woom
• Zoe

*We are not an authorized reseller/dealer of Nuna.