This set of plans for geodesic climbing frame are a great introduction to building geodesic domes, using the same system as all the other kits but with only one triangle frame, yes the whole dome frame is made from just one shape of triangle!
This design is based on a Pentakis Dodecahedron, all faces and dihedral angles are the same so making this is really straightforward.
This one is 2m diameter but I can make plans in any diameter and in metric or imperial measurements.