I remember watching this movie so often when I was very, very young, but can't remember the title.

I DO remember bits and pieces of it though. I remember the mom being in traffic during a heavy rainstorm in a yellow coat.
I remember the baby sitter was dressed in crazy colors and had magic powers. She sung songs with the kids (a boy and a girl, I think), and had animal crackers in their soup.

Please help me!

Marry Poppins?
The animal cracker song is from a Shirley Temple movie, I believe that was in black and white though

The Electric Grandmother (1982) (TV) (http://www.imdb.com/title/tt0083876/) Give this one a try, one of my favorites as a kid.

Simply Magic, Episode 1: The Rainy Day Adventure (http://www.amazon.com/gp/product/B0000D9PIX/ref=pd_lpo_k2_dp_sr_1?pf_rd_p=486539851&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=6302729874&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1MZ4VNFA930P0Q2AX09Z)

No... I know it isn't The Electric Grandmother or Mary Poppins, and defiantly was NOT a Shirley Temple movie. The babysitter was young, and they sung more songs than just animal crackers. I vaugely remember them singing Splish Splash I was taking a bath also. It took place in the time that it was made, and there were lots of bright colors like pinks and purples... Does this help a bit more?

Simply Magic, Episode 1: The Rainy Day Adventure (http://www.amazon.com/gp/product/B0000D9PIX/ref=pd_lpo_k2_dp_sr_1?pf_rd_p=486539851&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=6302729874&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1MZ4VNFA930P0Q2AX09Z)

OMG I think that's it! Thank you so much!

You're welcome!