55 per cent of those aged 8 to 12 did not tell a parent when bothered, confused or upset by this content, rising to 63 per cent for 12-14 year-olds.
More than two thirds of primary school children have been contacted by a stranger during an online game.
A survey from CyberSafeKids has found a quarter of children in this age group have experienced harmful or upsetting content while online.
55 per cent of those aged 8 to 12 did not tell a parent when bothered, confused or upset by this content, rising to 63 per cent for 12-14 year-olds.

Two Separate Weather Warnings Issued For Tomorrow
International Wholesale Prices Are "Not Price Gouging", Says CCPC
Costs Of Home Heating Oil Up By 67.5 Per Cent Between February and March
91-Year-Old Lelia Doolan To Arrive In Monasterevin Today As Part Of Her Walk For Peace
Harvey Norman Nationwide Cancer Fundraiser Launched
Operation Against Romance Fraud Network Leads To Arrests In West Dublin
Tánaiste Says Fuel Prices Should Drop Sooner Rather Than Later
Major Garda Crackdown In Place On 'Lucky Dip' Criminal Gang