This year we have used the Evolution 4x4 set as a basis and come up with some more very simple models. First there is a biplane that uses just two nuts and bolts!
|Two bolts, one aeroplane|
|Does it bite?|
|The modern wobbly skier - a slimmed down version|
All three models were built from parts included in the Evolution 4x4 set, pictured below.