There aren't a lot of options, but here are a handful of foot-shaped socks for kids!
Amazon - This is one of the only places I've found toe socks for kids Plus12 - My boys don't like toe socks, but they love these anatomical socks! You can also order Plus12 from Wildling Shoes Magical Shoes - 99% Merino wool socks with a wide toe box and non-skid bottom. Use code [sc name="magical-shoes"] for 10% off Foot Buddy - Tube socks with no heel cup and relaxed toe box. Use code [sc name="foot-buddy"] for 20% off Joe Nimble International - A couple toe sock options for kids. Use code [sc name="joe-nimble-int"] for 10% off your first purchase