Butterfly Additon Challenge

Launch: Draw or have on the board a triangle, a square and a rectangle. What is the odd one out?{...}

https://www.youtube.com/watch?v=xMgZki6MdAc Watch this clip. What do you notice? Some of the objects are not connected with gaps so is this{...}

Launch: What is a pattern? What makes it a pattern? What can you do patterns with?   Make a pattern{...}