How many students can visit the van at a time?

One class of students should visit the van at once. No more than 30 students can visit the Van at any time.  The smaller the number of students, the more involved the visit will be.  It may be beneficial for some larger classes to split into two groups, if possible.

Only 4 students will be allowed into the van at once to see how the machines and technologies work.  The other students will be working at tables and stations set up outside the van.