When my youngest son turned two, I went a little crazy with the "2" theme! But I loved the end result! Idea for the cake and the colors came from the hostess of all hostesses, Martha. You can find the how to on the cake here: Number Themed Cake
I made the 2s for the cupcakes out of a simple fondant created right in the microwave combining marshmallows, water, powdered sugar, and shortening until I got to that right consistency. I have a set of very small numbers and letters cookie cutters that I used for the 1 year old party (check out THAT party idea!) and it worked perfectly to create the 2s on the cupcakes.
The frosting for the cake and the cupcakes was a tried and true buttercream recipe from Wilton. Buyer beware on the vibrantly colored frosting - for those who ate the cupcakes, we were a little surprised to see blue and green in the potty the next day!
The favors were giant Rice Krispie treats in the shape of a 2 dipped in melted white chocolate and decorated with polka dot icing. To create the favors, I made large batches of the treats and developed my own template of a 2 using WordArt in MS Publisher, cut it out, then traced the 2 with a small knife to get them out of the pan.
We also had snacks complete with a tray of cheese and crackers where I took a 2 cookie cutter to slices of cheese!
I hope this will inspire you to throw a number themed party!