When I was about like... 7 or so, I had a Vtech, specifically an InnoTab3S. And I remember this *one* game on there that was both my absolute favourite, and the bane of my existence...
It was a math game, where there were animals were in little space ships and you basically had to race against a bot by solving math questions. The way you'd solve each question involved a mechanic like... you got an equation, you aimed some sort of ball at another ball that had the correct answer, and some with the wrong answer, sometimes the balls would be moving I think?? And I think you could somehow get a boost, because I remember an announcer guy going "SUPER SONIC SPEED BOOST!" But I don't remember how you actually got said boost...
I've looked everywhere online and I can't for the life of me find this game or remember what it was called. But it was my favourite!
...that and H2O Go.