Flowtoys day and LED triads have a simple elegant design - easy to assemble and disassemble, and the hubs are modular. You can remove the spokes from the hubs for travel, and color swapping.
You can find different colored hubs here.
There are a few important notes:
- do not lubricate the spokes
- do not store them assembled especially in a hot car
- do not remove the gem pop caps in the day triads or the adapters in the LED triads
Otherwise they are good to go ... have fun!