FDM 3d printing, PLA, LW-PLA, PA-6GF, PETG... shouldn't need supports other than the launch lug on the body tube.

Extra materials-

Estes Parachute or other like
Ejection cord can make one out of a rubber band
Sandpaper to get a proper fitment
Glue for assembly

Assembly:

1. Insert the motor hook into the tab on the motor tube
2. Glue in two of the motor rings (> 35mm apart), with the top one covering the tab on the motor hook
3. Insert the fin slot into the fin (3x).
4. Then take the motor assembly, slide it into the body tube, and make sure the motor hook isn't in the way of the fin openings.
5. Then glue the fins into the slots and
6. Put the nose cone on
7. Tie the parachute and ejection cord

Engines-
Any 18mm x 70mm engine will work (ex, Estes A, B, C, and some 18mm D)