Weird Science (1994)

Comedy series, 88 ep
–Year: 1994-1998
–Year in film: 1990s 
–Country: USA
–Who in bibs: Chett ~3+8 
–Available on DVD: yes
–I own: no
–Bib occurrence: low- ?
–Rating:  3/10 ?
–Rating: ***
–Comment: At least 2 boys Chett aged 3 and aged 6, latter one played by ~8 yo Justin Chapman (pictured, also one year later in "Problem Child 3") in dark blue shortalls. The 3 yo in long dark blue bibs. Same shirt, same chair. The shortalls should show the growth (but are still shorter than the other long pair). S2e12.

Another one from the age transformation site. (This time there were pics of this episode). 

Based on the great 1985 movie.

I have briefly checked some few clips. I bet that there are more scenes (supporting actors). For now rating ~3 only.