8 low-cost, all ages things to do over Labor Day Weekend We’re not letting go of summer just yet. But the time of swimming pools, mountain camps and children on the loose is swiftly coming to an end. To mark the transition into fall and, hopefully, cooler temperatures, we picked eight Labor Day weekend events in the Denver metro area (mostly) that are light on cost and heavy on all-ages fun. Most events take place between Friday, Sept.