Nintendo’s stock price reached the highest in nine years after the videogame manufacturer launched a new line of cardboard, self-assembly accessories for its Switch gaming console, Forbes reports. The Nintendo Labo system, due for release on April 20, is likely an attempt to drive a second round of growth in the sales of the console after an initial burst following its launched in March 2017.

Panjiva data shows the rate of growth in sales may have slowed, with U.S. seaborne imports of Nintendo products having grown by 9.2% in the fourth quarter on a year earlier after a 66.3% for the third quarter.

It may also be a response to a renewed surge in sales of Microsoft’s Xbox, imports of which fell year-on-year but had overtaken those of Nintendo in absolute terms in November for the first time in a year. Imports in the fourth quarter rose 40.8% sequentially vs. a 35.4% drop for Nintendo. That likely came after the release of the Xbox One X system may have resulted in slow initial sales.

Chart compares U.S. seaborne imports of products based on company / product name for Sony Playstation, Microsoft Xbox and Nintendo Switch. Lower panel shows growth in all videogame imports by sea. Source: Panjiva