Unfortunately, most Schools do not sell such a Travel Pass at this time. Some colleges decide to use Ride bundles to provide a "pay as you go" system.
The Zeelo platform doesn't support selling Travel Pass where you only pay for a few days a week, instead of buying the right to travel all 5 days of the week.
Some Schools may decide to sell Ride bundles where you can buy 10, 30 or 50 credits (the amount can be customised) and use these credits only on the days where the child is using the program. When a School decides to sell Ride bundles, they may decide to release them after the Annual & Term passes to prioritise regular users. Ride bundles do not guarantee a seat, bookings are made on a first come first serve basis.
These decisions are carefully assessed at the start of each year in terms of financial viability for the school.
Communications from your School or Zeelo should indicate which type of passes will be released on what date. When a pass type hasn't been mentioned, it is safer to assume that it will not be put on sale.