Ninja Baby wants us to share some pictures of him in his new toy

From The Adventures of Ninja Baby

As some of you may know NB loves to stand and move so the Jolly Jumper is perfect for him, we have been waiting to use it until he got the head and body control neccessary to be suspended from a giant spring.

From The Adventures of Ninja Baby

We are also stealing an idea from WilyJeneric and conducting a poll (its over to the right). Ninja Baby has his 4 month check up on Tuesday. So the question is how big will NB be?
Some info to help guide your answers

• NB weighed 3170 g and was 51 cm long at birth (6lbs 15.5oz and 20") at birth
• At two months 5541 g and 60 cm at 2 months (12lbs and 24")
• When he was released from the hospital on January 14 he was 5150 g

There is a saying "double the birth weight by 4 months and triple at one year"