U can find them on amazon or as seen on tv... great for the energy of these guys.... but for kids? I will find u a link... but I made the mistake of buying another off brand? (As if you couldn’t get more off brand than as seen on TV!). But nothing stayed together... car died imeadiatly! Cheap, compared to this one. We have 2 more sets coming tomorrow! Kat
They are pretty inexpensive! https://www.amazon.com/ZOOM-TUBES-CAR-TRAX-25-Pc/dp/B07FFQ2P48
Lol! No.... zoom tube racer? https://www.amazon.com/ZOOM-TUBES-CAR-TRAX-25-Pc/dp/B07FFQ2P48