Amelia's Nana is a teacher (previously pre-k.) So, she sees the learning/play potential in the most unlikely of items. I have been giving Amelia fruit/veggie pouches for months. Sometime after I start Nana suggested I hold onto the brightly color lids for future sorting items. This is in fact a brilliant idea! Amelia loves playing with them and they are big enough she can't swallow them. Plus when she gets a little older we can use it for color and numbers. Can you find all the red caps? How many blue caps do you have? etc... It's just too bad for me that she likes to throw them everywhere.