A child can receive up to €250,000 from parents before gift tax is payable.
Once such gifts exceed 80% of the threshold then a declaration is required but obviously no payment unless the threshold is exceeded.
See here http://www.revenue.ie/en/tax/cat/thresholds.html
In addition one can receive €3,000 per annum (small gifts exemption) from any persons without eroding the CAT thresholds.