What magnetic tile set should I start with for my kids?

The PicassoTiles 60-piece Starter Set is the one I recommend because it balances quality and price well — the pieces click together satisfyingly, hold up to regular play, and give enough to build something substantial without overwhelming a young kid. It hits a sweet spot where you won’t need replacements in six months, but the price won’t make you hover over the kids asking them to be careful.