To tide you over until you can buy some kits, download and build some FREE MicroMaxx designs!
Art Applewhite has plans for a version of his Bic Stic rocket and a page of carstock MicroMaxx Qubits
here. (Click on "I Accept" on the Limited Liability page, and then scroll down to the bottom of the next page to find the links to those plans.) Also click on the link for a MicroMaxx version of his Six rocket, a 3FNC rocket with a difference, built entirely out of cardstock.
FlisKits has free plans for MicroMaxx versions of their now-OOP Triple Threat saucers
here. Again, scroll down to the bottom of the page to find links to micro versions of Persephone, Athena and Odysseus.
All of these plans produce great little rockets that are a blast to fly. Just pick up some 110 lb. cardstock at Walmart (a ream of Georgia-Pacific cardstock is just over $5, and you can make A LOT of cardstock rockets with it.)
Don't hesitate to check out the other free cardstock plans at both sites, too. You can make MMX versions of them by just printing them at 33%-34% scale (for rockets that are designed for 18mm motors) and at 48%-50% scale (for rockets designed for 13mm motors).
You can launch the Qubits and the Triple Threat saucers in your backyard. For the MMX Six, find a small field to launch it in.
MarkII