When my son was a year old, I made him a simple push around cart. He was learning to walk and the cart gave him stability to learn to walk.
Plus he loved putting things in it and pushing it around.
I'll have to go in the attic to retrieve it (he's 24 now) but the cart was basically:
- dimensions were probably around 14" wide by 16" long.
- four wooden wheels - I think they were 2 1/2 diameter on 1" square axles under the bottom
- made from 1/2" walnut - sides were 1/2 x 3 x dimensions above
- dovetailed corners
- handle was made from maple - two arms from 1" x 3/8" x maybe 18 "
- handle attached with brass screws
- 1/2" cross dowel for the handle
- finished in wipe on oil
He would play for hours with it for his first two-three years.
Hope this gives you some inspiration. Let me know and I can grab a photo.
neil