The students decide to go there , but Phoebe is worried about Ms. Frizzle embarrassing her and her former teacher , Mr. Seedplot ( Robby Benson ) .
The class is planting a garden , but Phoebe 's plant is at her old school .
The students decide to go there , but Phoebe is worried about Ms. Frizzle embarrassing Phoebe and her former teacher , Mr. Seedplot ( Robby Benson ) .
The class is planting a garden , but Phoebe 's plant is at her old school .