Sarah, the inventor

Sarah was building with Mega Blocks after she got ready for bed.

"Mommy, you know what this is?"
Looking at the randomly built plastic colored blocks, "No. What?"
"Guess!"
"Um...an ice cream machine?"
"No!"
"Um...a helicopter?"
"Noo!"
"A popcorn popper?"
"Nooo!"
"Can I have a hint?"
"It's for moms, dads, kids, and babies."
"Oh, a soda machine?"
"No. It's very bigger."
"Can I have another hint?"
"It has a pumper."
"A homework machine?"
"No!!! It's for moms, dads, kids, and babies."
"I don't know. I give up."
Pointing to her forehead, "Mommy, you have to think!"
Dang kid! Stop putting so much pressure on me! "I don't know. Another hint?"
"It's very bigger, it gots things, and it's not a helicopter or a soda machine."
"Oohh. Things. How about a toy picker upper?"
"Ok, Mommy. I'll tell you. You pump it," as she demonstrated the up and down motion of the 4 peg green Mega Block, "and you put it behind your bed and it makes it comfy!"
"Wow! What a great invention, Sarah. "

I was totally going to guess a comfy bed maker next.

Then we went through the whole process again with her next invention. This time it was an invention only for kids. I was guessing until Daddy yelled, "Last one to bed is a rotten egg!"
Then Sarah looked at me and said with a serious face, "Mommy, I have to go to bed now."
"Sarah, are you going to tell me what it is?"
Looking over her shoulder she said very seriously, "Mommy, I have to go to bed. I'll tell you when it's morning."

A good inventor never shares her secrets. Her mother might steal the patent while she is sleeping.