bicycle boy child cycling face father features fun health healthy helmet joy outdoor outdoors passenger recreation ride riding safe safety seat secure smile smiling son toddler young youngster activities artificial artificial structure ascend ascending belayer belaying climb climber climbing climbing harness climbing rope climbing technique climbing wall descend descending equipment give indoor sport outdoor sport portable wall rock climbing shoes safety harness shaped climbing holds sport structure surface take Tension youth arboriculturist arborist ascended Australia balancing belt chainsaw cutting danger dangerous ear-muffs expertise Harness height high lines lop lopping man-at-work noise-reduction Noisy professional removal remove removed risk risky ropes safety-glasses safety-harness sawing secured suspended suspension tall-tree tree tree-lopper tree-lopping tree-management tree-surgeon trees up-high work workman access-limited advice advising alert appropriate-behavior appropriate-behaviour authorised-entry-only authorized-entry-only black blue boots care caution clothing concern construction-site directions eye-protection feet footwear helmets information informing injury limited-access peotective-equipment protect protection protective red restricted restriction restrictions risks sign unauthorised unauthorized visibility warning warning-sign white workers workmen