I found this great cut file at Mardenz, you really should check out her website, she has a lot of great cut files and is always happy to create one for you if you ask!
To make Hoops and YoYo jump off the card, I had to cut "steps" into the base card (the orange paper) and mounted Hoops and YoYo onto separate steps. I hope the next picture helps explain this.
If you look at the picture below, you will see an example of three separate "steps". The lines on the left are where I would cut to make a "step". The middle step has been cut and bent down, bending it down makes it easier to fold the "step" to the inside of the card, the "step" on the right has been bent to the inside of the card. If you notice each "step" is a different length. The deeper the cut is, the more the item you mount to it will pop from the card. The flip side of that is the item you mount to the longer step has to be shorter to fit into the folded card.
After you fold the cuts to the inside of the card it should look similar to the picture below. You can see why I call them steps.
You just mount your items to the front of each step. Make sure that the items you mount to the steps will fit inside the folded card or inside the envelope you have for it. I first mount the item with repositional tape then fold the card shut to make sure it fits.
The cake and ballons were cut using the Stretch Your Imagination Cricut cartridge, each balloon was mounted using pop dots. The "50th" was just mounted onto scrap paper and I hand cut the shape, then mounted that onto the middle step. I used glitter paper to make the silver icing for the cake and plate, the flames for the candles were made with orange stickles.