No, easyMoney currently only offer an Innovative Finance ISA (IFISA), you have to be 18 or over to invest in an IFISA.
Junior ISAs (JISAs) are savings or investment accounts for children under 18, managed by a parent or guardian until the child is 16, the child can then take over the management of the JISA, but can't withdraw any money till they turn 18.
The maximum that can be invested in a JISA is currently £9,000 per year, this can be split between Cash or Stocks and Shares JISAs, but cannot be invested in IFISAs.