People should stop using the products immediately and keep out of the reach of children, the government says.
The Splashpad opens between 10:00 and 18:00 each day until 30 September, officials say.
There are concerns that three years after new legislation was implemented, children’s voices are not being heard.
The attack saw 23 children and the facility's proprietress kidnapped by gunmen on Sunday.
Around a third of Welsh children live in poverty, the highest among the four UK nations.
A park is updated with equipment to encourage imagination, physical and social play, a council says.
Torridge District Council says £210,000 has been spent to refurbish four parks in its district.
The event, which starts at Horse Guards Parade and finishes on The Mall, welcomes 20,000 runners.
