Trying To Find and Remember Old School Kid’s Games

I remember YEARS ago, back when I was in late primary or sometime in middle school, there was a site like coolmathgames and it had a bunch of different puzzle solving games. Every once in a while I keep trying to remember two specific ones. I don’t remember the names, but all I remember is that one of them had a handcar where I think you build a bridge and the other one had a puzzle where you connect pipes like the pipe puzzle in FNAF Sister’s Location. Please help me remember the names of the games and site because it bugs the hell out of me everytime I try and fail to.