Ants:
A teacher talks about using Lego with students to investigate simple concepts.
We have a class set of lego in the ICT/STEM store room - enough for one between two students to make Lego cars to go down a ramp. See slideshow at left for activities.
We have 6 Dash robots that can be used for Push and Pull experiments. The bulldozer attachment can be used to push. Students could use lego to build a trailer to attach to Dash to allow him to pull.
Bee Bots and Blue Bots also have trailers to pull things. Cardboard and blue tack make good bulldozers to push objects.