'The Fly' is a beginners indoor model I designed a while back - based on the Ikara prop set.
Originally it was just a project for a Science 'Maker's Faire' here in Adelaide, Australia - and I produced a short run of kits (https://theflyadelaide.wordpress.com/
I got some interest from schools as a STEM Science project and still make a few kits for schools from time to time.
The object of the kit was to design something that would produce good results for a first time flyer - and would be small enough for most school gyms, science rooms etc.
Let me know how you go.
I sent a kit to Aki (adanjo) and his flew very well. But Aki is not a first time flyer!!
Having said that, many others have built the kit and it seems to perform consistently. Though the rubber currently supplied (about 1mm x 1mm) is overpowered.