If you have a kid who wants to play piano but hates the 'sit still and look at this dusty book' vibe of traditional lessons, this is your best friend. It’s effectively the 'Gamification of Piano' done right.

Just a heads-up: don't confuse this with the 'Synthesis' math tutor app or the SpaceX-linked school. This is the piano tool (often spelled Synthesia). It’s clean, it’s effective, and it’s one of the few apps that actually justifies its screen time by building a real-world physical skill. Just make sure you eventually turn on the 'Sheet Music' mode so they don't become totally dependent on the falling neon blocks.