you could number the dots as well and do fine motor skills with math DIY lacing cards for activity. Pick your theme-animals, space, nature. Fun activity to go along with older students studying Apologia Zoology, Astronomy, or Botany
Printable lacing cards are great for plane trips. Use shoe laces and bright motifs on laminated card, like these Car Lacing Cards from Busy Little Bugs. These don't need a tray so are great for takeoff or landing.