Us adults can decorate till we are blue in the face, make every little detail perfect, and organize the perfect event... but all the kids really want is to HAVE FUN!
We had a good age range of kids at our 2 year old's birthday party. Youngest was 3 months and oldest was 10 years old. Obviously the littlest one didn't really come into play with the activities, but we did have about a dozen kiddos to keep entertained.
We had a Bubble Guppies/Under the Sea theme so I ran with the "bubble" part of it.
I came up with three fun activities that would be great for all the kids we had for guests. You can see all those great activities in the video I've included below.