Ditto on what the others said. They are hyper, but that is better for their health. Cat nip also calms them after a while. And more than one tree is needed. I have blinds but few are whole. I haven't hung curtains in years since Sam is determined to climb every one. No indoor plants since Sam likes to dig every one up. Rosie would climb every tree and try to sit in every wreath, even the ones on the doors. I always got them their own wreath or garland and laid it on the floor.

Good luck and don't give up. Keeping their claws clipped is a good idea.