We tried the Johnny Jump Up yesterday - poor thing's still a little too tiny! I didn't have the height quite right so her feet didn't touch the ground. She kind of just spun around mid-air and chewed on the front. It was huge - we'll try again in a month or so.
She thinks she is so big when she sits up in a chair...
And she is loving to chew on her hands lately - sometimes after we put her in bed at night all we hear on the monitor is her sucking on her hands until she falls asleep.