Origami Triacontahedron!!! I learnt a new type of origami module for this and a new type of shape! The faces are rhombuses. Diagonal lines across the long part of the rhombuses form the edges of an icosahedron. Diagonal lines across the short part of the rhombuses form the edges of a dodecahedron.

Beaded Archimedean Solids!!! I had lots of fun over the past two weeks making these for the pigeonholes at the TMiP conference. [Each n-regular graph has an n-colouring and there's a pair of colours on each one which form a Hamiltonian cycle.] #TMiP25 #MathsArt #MathArt #Polyhedra