I had a house builder kit when I was young. I'll describe it the best I can and perhaps someone will know what it was called.
This would have been late 50s early 60s. There was a plastic base with hundreds of very small holes in a grid pattern. Into these holes you put thin steel wire that then stuck up a few inches. Small panels that represented bricks or some other exterior wall material were then slid over the wire uprights. I am not sure if there was a roof of any sort, but I think there must have been windows and doors. I used to play with this toy with my dad, so some very deep memories coming up here.
One thing I do remember about toys when I was a kid, batteries NOT included! How many prezzies did I open on a Christmas day only to discover no batteries. You couldn't pop out to a petrol station or corner shop back then.
Who got a chemistry set? Who knew what to do with it? Who became a chemist because of it? At least I became a builder!