You have decided to be an engaged parent! That's awesome. The world needs more of that.

The SteamDeck is, as a wise sibling said, not for playing more games, but for playing games more. It's really excellent for gaming in very small doses as opportunities arise. Find yourself waiting for 5 minutes for someone to do something? Hit the button, pick up the game right where you left off. When you get interrupted, hit the button, it goes right to sleep. Perfect for a busy life.