I let my daughter play with these today, and oh my goodness it's like a match made in Heaven! She loved them and they are exactly the kind of manipulative for her personality/interests. I let her play while I looked through the grade 1 manual I have, I've had these lying around for months, someone gave them to me. As I'm reading, she's doing the exact things with the rods the manual is saying to do for the lessons, and was having tons of fun making things out of them. I feel so relieved to finally find something that I think will work for us for math, after endless searching. I'm excited!