Melt marshmallows and butter together in microwave for about 1 minute. Take out occasionally and stir to check if it’s melted to make sure you won’t over cook the marshmallows.
Each layer will be a frame of your animation. Utilize the opacity bar, guidelines and layer visibility to arrange your object in each layer.
When you’re done making each layer of your animation, open up the Timeline tool by going to Windows-> Timeline. It should pop up on the bottom of your screen.
Click on create Frame Animation.
Select all of your layers.
On the top right of your timeline window there is an icon with 3 bars. Click on it and the Make Frames from Layers
Your layers should then be arranged in order. You can adjust the duration of the frame and press play to preview the animation.
When finished, export as a GIF by going to File->Export->Save for Web. You can preview again before saving.
Fold the paper into 8ths (folding in half lengthways, vertically and diagonally)
Fold in all four corners to the center to make a smaller square
Fold this smaller square into thirds on both axis to create lines that separate the square into 9 tiny squares.
Open up one of the corners of the smaller square, then fold in the left and right tiny squares in the top row until it brings in one of the walls of the boxes. There will be a little triangle sticking up. Tuck that in.