December 20, 2020, 9:00-9:30am. Nia (5), Bab (5), Gye (5), Dem (5)

Last time, Dil was playing with the cubes and making towers of 1, 2, 3, 4, and putting them next to each other. It reminded me of something I read and I created the first activity.

```Supplies: A few Mathlink or Unifix cubes.
What to do:
- Invite the children to make a few "triangle numbers" as in the picture below, then count the number of cubes in each triangle. Write the numbers down (the first three are 1, 3 and 6) ```
`- Invite the children to make a few "square numbers" then count the number of cubes in each. Write them down also. `
```- now invite the children to take the sum of the two consecutive triangle numbers. Do they see a pattern? (answer: the sums are square numbers!)
- can the children take the cubes from two triangle numbers and make a square?
```

```Supplies: two dice.
What to do:
- Say that you are going to roll the dice, add the numbers on top, then keep track of them. It is like a number race.
- Ask what numbers could come up and write 1 through 13 and the numbers suggested on a line.
- Ask each child what number they think will come up more often.
- Invite the children to roll the two dice and find the sum. Then record the sum by putting an X on top of the number. The first number to get 6Xs on top wins. ```

### How it went

Both activities went really well. The kids likes making triangle and square numbers. They noticed that adding two consecutive triangle numbers gives a square number. I showed them how to make a square with the cubes and they were quite happy with it