Mim's Glow Workshop — Compose Shapes from Pattern Blocks

About this activity

Mim the glow-smith forges light by fusing small glowing pattern blocks — triangles and rhombi — to fill a blank lantern outline, making a rhombus, a trapezoid, a hexagon, and more. It's an interactive Grade 1 geometry activity that runs in the browser with no account.

The big idea is composing shapes — that bigger shapes are built from smaller ones, and the same shape can be built more than one way. The rounds go beyond simply filling an outline: children re-forge the same hexagon a new way, re-compose a shape into a long bar, cover a space using only triangles, and grow a partly-built shape into a finished hexagon. Because a triangle and a rhombus can both help fill a space, a child has to choose and arrange pieces that actually fit, not just drop blocks in.

It is aligned to Common Core 1.G.A.2 — composing two-dimensional shapes to create a composite shape (also K.G.B.6). No timer, no score — just calm, playful practice.

What's inside this activity

• Designed for Grade 1 learners (ages about 6–7)
• Common Core strand: Geometry
• Aligned to Common Core standard 1.G.A.2

How to play

Look at the blank lantern outline you need to forge.

Fuse triangles and rhombi to fill it — or re-forge the same shape a new way.

Not quite? Rearrange the pieces and try again, with no timer and no score.

What your child practices

• Building a larger shape from triangle and rhombus pattern blocks
• Filling a target outline with pieces that fit, with no gaps or overlaps
• Making the same shape more than one way, and re-forging it into a new shape
• Covering a space using a chosen kind of block, or finishing a partly-built shape

Learning goals

Compose two-dimensional shapes into a larger composite shape — the focus of Common Core 1.G.A.2

Understand that bigger shapes are made of smaller ones, often in more than one way

Build the spatial-reasoning foundation for later geometry and fraction work