Here's something even easier. Go to Hobby Lobby, Michael's or even Waltmart. Buy laminating sheets designed for photos - they come in 5x7 and 8x10.
Buy a bunch of Mickey stickers - I found some with waves, beach stuff, etc. Go to Home Depot and get some Green Mickey Heads in the paint section
Come home, lay it all out on top of the laminating sheets to give yourself an idea of what you want and then stick them on. Add some sticky magnet tape (at the same stores) and you're good to go.
You can even write on the green mickey heads to "personalize" it or get some alphabet stickers to add your name, date, etc.
It was super easy and my friend's dh and I made them together (lol, you know if I had a man doing a craft, it was easy!). The only bad thing was we forgot to take pictures!