# Further fun with the Archimedean Solids at the Curious Minds Club (St Thomas of Canterbury Primary School, 13 March 2020)

This week at the Curious Minds Club we continued to build the 13 Archimedean Solids, with Polydron Frameworks and Magformers.

My Y2 girl who got half way through a Truncated Icosahedron two weeks ago (then had to miss last week’s session) was happy to finish it. She then got her first go at Magformers. She made several of the Platonic Solids from looking at a picture of the net, then made a lovely symmetrical pattern on her own initiative.

I asked my two Y1s to build a Truncated Cube in Polydron. Once they had got the alternation correct at the start (put a triangle on one edge of the octagon, miss one edge, add another triangle etc) they were able to bring the whole solid together. They needed a little help snapping it together at the end.

My Y5 boy completed the Icosidodecahedron in Polydon, having made it in Magformers last week. My Y4 girl made the Cuboctahedron in Polydron first, then in Magformers. She built the Rhombicuboctahedron in a Polydron net really quickly, then needed quite a lot of help bringing it together. With a few minutes left at the end I gave her the Tangram puzzle. She solved it in a few minutes with no help. My Y6 girl and Y6 boy attempted the Rhombicuboctahedron in Polydron. It didn’t go quite to plan. Bob was born instead.

Here are the photos:

Y2 girl. Truncated Icosahedron (you may know it as a football); three Platonic Solids (can you name them?)

Y1 girl. Truncated Cube; half an Icosidodecahedron (to be continued).

Y1 boy. Truncated Cube; Truncated Octahedron; a Heart.

Y4 girl. Rhombicuboctahedron; Cuboctahedron; a completed Tangram.

Y5 boy. Icosidodecahedron. Really pleased with the angle I took this at: you can really see the line of reflection symmetry.

Y6 girl.   Meet Bob. Apparently he doesn’t have a best side. He looks good from every side. Hard to disagree.

# Continuing the Archimedean Solids at the Curious Minds Club (St Thomas of Canterbury Primary School, 6 March 2020)

This week at the Curious Minds Club we continued to build the 13 Archimedean Solids. We used Polydron Frameworks and a new material – Magformers.

My Y6 girl and Y6 boy sat together and used the Polydron. They started with the Truncated Dodecahedron. I then asked them to make the Cuboctahedron, explaining that it uses the six squares from the Cube and the eight triangles from the Octahedron (hence the name). Continuing with this theme, I asked them to make the Icosidodecahedron: it uses the 20 triangles from the Icosahedron and the 12 pentagons from the Dodecahedron. They needed very little help from me to work through these.

Meanwhile I introduced my Y1 girl, Y1 boy and Y5 boy to Magformers. The younger children can find it hard to snap together the Polydron pieces so I wanted to try them on a material that uses magnets to join the pieces together. I started them on all five Platonic Solids, asking them to use a picture of the net to make the shape in two dimensions, then lift it up and join the edges together. This worked really well. Even the Icosahedron comes together well, provided you work from one end to make one half, then switch to the other end, make the other half and bring them together.

My Year 1 girl was then determined to have a go at the Truncated Icosahedron in Polydron. She had seen an older girl make one last week and must have thought “I can do that”. With some reminders that every pentagon is surrounded by hexagons she was able to complete this one. She took it out to show her mum at the end and looked very proud.

I asked my Y1 boy to make a Cuboctahedron in Magformers, from a picture of its net. He cracked the net and just needed a little help lifting it up and joining the edges. He then made some fun shapes: a fish, hourglass and small star.

My Y5 boy also made the Cuboctahedron in Magformers. He then asked for ‘something harder’ so I showed him the net of the Icosidodecahedron, which he cracked. Not content with this, he went on to make a copy of the Compound of Two Tetrahedron (not an Archimedean Solid but I brought my model with me again as it is such a nice thing to look at). He worked really hard to figure out where each of the 24 triangles should go.

Here are the photos.

Y6 girl. Truncated Dodecahedron; Icosidodecahedron.

Y6 boy. Truncated Dodecahedron; Cuboctahedron.

Y1 girl. Truncated Icosahedron.

Y1 boy. Cuboctahedron; Fish; Hourglass; two views of a Small Star; one of the Dodecahedrons.

Y5 boy. Cuboctahedron; one of the Dodecahedrons; Icosidodecahedron; Compound of Two Tetrahedra.

At the end of the session it is irresistible to build some towers.

This one gets bigger and bigger. It ended with a Tetrahedron on top, then threatened to topple over so we had to stop.