These Tog'l blocks or Toggle blocks by Mattel were a favorite toy of my children in the 70's. I thought the plastic would get brittle with age but apparently it didn't. Yes, Mattel should begin making them again. They have more versatility for creative innovation than the Lego blocks have with their cube shape and hinges. Please, Mattel, bring them back. We don't understand why you stopped making them!
I'm a grandmother now and I would love to be able to give a set of these to my grandkids!