Hardening in sauna.

As my daughter often having a cold, can I hard her in sauna?
A sauna is a best method for hardening, and for children since 3-4 y.old, but avoiding sauna in chronic bronchius damages, lungs, heart, and hardening effect is contrast cycle with warming, cooling, resting, and in a high temperature a vessels are widening, in cooling are narrowing, as this a best training for theirs, and do not steam a children more,than ten minutes, and same going for a cool shower, and 20 minutes is resting and after repeat this if a children is big, and if children a first time visiting sauna, do not stay in steam room more than at 5 minutes,and do not pour over a cold water, and this will be a shock for him, and he will not visit sauna again, as using a warm water, lowering temperature slowly, and if children are good habit to sauna on winter a stew room changes on a rubbing with snow, and swim in lake, and this a shake for organism is benefit, and in cold to warm a body with a lime broom, and he helps in headache, birch broom helps in aches, and oak calms, and anti inflamed has, and in Russian sauna a hot stones pour over with herbs infusions, and disinfects air of dried mint leaves, sage, thyme, eucaliptus, calming you a thyme, mint, chamomile, birch buds and fresh fir needles and for improve a breath using dried leaves lime, oak, birch, oregano, thyme, as they are taking on same mass and for tone effect a portions are same, as a one part of dried poplar buds, as two of flowers tansy one part of dried leaves Hieróchloe, and take children for sauna since three y.old and for 5 minutes, and in a few visits you can stew for ten minutes, and small childrens after a pour over of cool water,  older are using a pool, and in sauna dry use a dry body, and in Russian sauna pour over a warm water, on a head wear hat , protecting from over heating, and do not visit sauna on an empty stomach, and for night.