Click a slot or drop a photo on it. Photos are cropped to a square and shrunk automatically, so every card matches.
Click tokens to fill them. With "My photo", click the picture slot under the board's tokens to choose the token image. Click the reward slot to add a photo of the reward.
Add a photo and a label for each activity, in order. Use the arrows to reorder. Tap Done as the child finishes each one.
Add a photo for the task (First) and the reward (Then). Click tokens as they are earned. When the row is full, Then lights up.