Well my mom uses those rumba things and I personally think there stupid looking tinker toys that take way too long to get the floors clean. But, as I've seen they actually do a good job of cleaning up and I KNOW Frankie would use it.
She does a fine job at Foster's but a little extra help I think would be very useful to her. Plus, it could also keep Bloo occupied in the meantime. I could so see him riding a rumba around Foster's like it was a skateboard or surfboard or something.
And Frankie would probably have to yank him off of it
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