They are pushing a cart of donuts, ice cream, and cookies, while simultaneously frosting and walking along cupcakes. Lots of sugary desserts, so, it looks fun :-)
To see this entry, other entries on the topic, and last week's entries (for "Immovable"), go to www.illustrationfriday.com.
Bonus: The selected image for "Immovable" is a cute sleeping dragon! I love dragons and it was a welcome image to see first thing on the I.F. Homepage.