Ricky Ricotta's mighty robot vs. the Jurassic Jackrabbits from Jupiter - Dav Pilkey

From the creator of CAPTAIN UNDERPANTS, comes an out-of-this-world
friendship adventure - now in full colour.
It's Ricky Ricotta's birthday, and as a special treat, his parents
are taking him and his Mighty Robot to see dinosaurs at the museum.
Too bad they've also invited Ricky's little cousin Lucy - she's
a real pest! When they get to the museum, all the dinosaurs are
missing their heads . . . because an evil spacebunny from Jupiter
has used the dino DNA to create Jurassic Jack Rabbits! Now it's
up to the entire Ricotta family, including Lucy, to stop them
from taking over the planet.