Have one student hold the index card while the other student places the tube of toothpaste under the hole and slowly squeezes until the grass is pushed up into a small dome over the squeezed toothpaste (alternate method - take the cap off the tube of toothpaste, drill a hole in the cap, place the index card hole over the neck of the toothpaste tube, and place the cap back on so the card is fastened between the cap to the tube).
(the other student; places; the tube of toothpaste; under the hole) (the other student; slowly squeezes; T:until the grass is pushed up into a small dome over the squeezed toothpaste) (the grass; is pushed; up; into a small dome over the squeezed toothpaste)
the other student the other student the grass
places slowly squeezes is pushed
the tube of toothpaste under the hole
T:until the grass is pushed up into a small dome over the squeezed toothpaste
up into a small dome over the squeezed toothpaste