Reaching high places:
If you are having trouble getting to high places, look for a bar and press A.
When you are swinging with Y, press A button to make The Grinch jump off the bar.
Use the egg launcher to shoot the kids to make them drop their presents.
Slime the security guards to get a present.
Look on top of the town's Christmas tree to find a hidden present.
Entering Town Hall:
Use the egg launcher to shoot the clock to get inside Town Hall.
Finding the blueprints:
Go to the bottom level of Town Hall and find the three rugs on the wall that
appear differently than the others. Pull out the rugs to find the blueprints.