During the 1960s, my Dad ordered for me a series of science kits that
had plastic bases and were meant to snap together at the sides.  These
kits were designed for various aspects of science; to include a
weather station for meteorolgy; a small AM broadcaster project to
study electronics; and so forth.  It was possible to buy one kit at a
time, assemble it; and then snap it together with previous kits that
had been already assembled. Do you know of the name and manufacturer,
the price of the kits, whether a catalog is available, and whether
some of these old kits might be available on EBAY.  Thanks!