In Google Jamboard if you have wanted to have students pull out hidden images, pictures, or text from an object for an element of surprise try my Pull a Rabbit out of the Hat template.
Add Hidden Images, Text, or Sticky Notes to Jamboard
On the Jam insert Images and drag them into the hat. They disappear! Create the vocab words on Sticky Notes and hide them in the hat. Students can then pull objects that you have hidden in the hat out of the Jamboard.
To make this sample Jam I created a background that has a rabbit in a hat. I made sure that the hat was black. I then used the black marker in Jamboard to scribble over the hat. Pen strokes are always on top. So if you’re able to make a giant scribble then any objects you move around on the Jamboard frame will be hidden under that scribble.