I posted this deal yesterday but it went out of stock and the thread was marked expired. It now appears to be back in stock and slightly cheaper at $2.99! Here are the details from the thread I posted yesterday
After building this with my kids over the weekend https://www.jpl.nasa.go
A quick amazon search brought up this foot pump, at a fraction of the price of the rest. I cannot speak to the quality, but if I get at least 5 or 6 stomps out of it, it will be worth it , as re-inflating the 2 liter each time is a huge pain!
It is an add on item, but if you have the amazon music app, alexa, etc.. you can simply add it to your cart and ask alexa "buy a foot pump" and she should find it from your cart. I hope this helps someone!
https://www.amazon.com/gp/product…UTF8&