I just started building a toy box for my 5 year old Grand Daughter Nothing remarkable about the construction . all 4 sides will be birch plywood and it will 4 corner post milled from reclaimed oak . These peices came ( I think) from some old pallets they were 50" long 3& 3/4 " wide and an inch and half thick. . All 4 panels will set in dados in the corner parts. I have decided not to put any type of legs on the box since my grand daughter is such a monkey she'd probably break them off climbing on it.