Keystone Teeter Tots Model #503 Breadcrumb Navigation Derrick Clow Published: March 19, 2014 Categories: Playsets & Buildings Keystone Teeter Tots Model #503 Keystone Teeter Tots #503 Instruction Sheet This is the smaller of the Teeter Tots sets. The figures are plastic and can be balanced with or without pegs. This set appears in the 1954 catalog. From my private collection.