You definitely want to put a stop to the tip toe walking and the parents should be on board too. As a parent of a tip toe walker, they don't want to go through what we did. There could be medical reasons they walk on their toes or it could just be a really bad habit. It is normal to do a bit of toe walking until age 2...after that it is a sign of possibly something else going on. For my son it was a bad habit. At age 5 he went through extensive testing, long needles put into his legs to listen to the muscles, MRIs, cat scans, blood tests, etc...you name it, he had it...at age 5. It was absolutely heart breaking and they couldn't find any medical reason for it and to this day (he's 10 now) they still have no idea why he does it. He was casted for 2 months to stretch out his achilles tendons because they were so tight it limited his movements in his feet. Every 10 days we would go to the children's hospital and they would take his cast off, stretch his legs out more and recast in the new stretch. It was very very painful for him and heartbreaking to watch him go through that. After his casts came off he had to go to physio for 6 months to continue to stretch his legs out. His feet and walking are a lot better now 5 years later but it's taken this long for it to be that way. So...my advice is to make the parents see what is happening and to seek medical advice if it's not being corrected because if it is a medical reason for them doing this, it needs to be addressed and if it's habitual, they need to break it so their kids don't have to go through what my son did. We didn't notice he was walking on his toes until his kindergarten teacher pointed it out to us. We were always watching where he was going because he was so active and in a hurry, we weren't watching how he was getting there and we really wish we had noticed it earlier so we could of prevented everything he had to go through at such a young age. The Dr. wanted to cut his legs open to slice the achillies tendon to lengthen it but we wouldn't let them, we wanted to try all other options. Surgey for this is very very painful and a long recovery and is not 100% garenteed to completely fix the problem forever so we weren't willing to do that to our child at that point. He had already been through hell.